It certainly can be a disorder, in that it can be very disabling. Of course it depends on the severity. I'm glad that it isn't something I've had to deal with myself, but I have seen it in others. One guy I knew during childhood was very affected by it in particular. It's a great thing that awareness about the condition is being spread, even if it isn't enough. I am sure that the kid I knew could have been spared of a lot of hardship had he been diagnosed. But back then nobody knew about the condition, least of all the kids he went to school with. All we saw was an intolerably egotistical kid with no empathy whatsoever. Which led to him being brutally bullied, every single day.
I remember that one of my teachers approached me and some of my friends and asked us if we'd mind hanging out with the kid, just once in a while. She told us that he was just a normally functioning kid who'd had some bad luck making friends. At that point we knew very little about him, but when we invited him home one day, it became obvious within minutes that the kid was insufferable. He just did not function socially and he threw tantrums all the time, literally.
When he was finally diagnosed with asperger's, I guess the damage was done. He had been left to fend for himself in the schoolyard jungle as a kid, through puberty, as an adolescent, and I'm not sure he's experienced much else than defeat during those years. It's such a shame that he wasn't diagnosed much earlier and placed in environments much more fitting to his condition. Instead he ended up being bullied and beaten up, kicked out of several schools, kicked out of home by his own parents. His parents took him back when he was diagnosed, but the last thing I heard of him was that he'd attempted suicide several times.
Looking back, I feel extremely bad that I didn't do more to make his life a little easier by being around him more, but the truth is that it wasn't possible. I also feel ashamed that nobody tried to help out a kid that obviously had problems, that nobody even tried to find out if he had a disorder of some kind. And finally, it makes me sad to think about how many kids have experienced the same thing. Awareness, awareness, awareness!
I should mention, of course, that I also know people with the disorder who have no severely debilitating problems functioning professionally, socially and romantically.